Tool for dental operations.



N0. 797,270. PATENTED AUG.15, 1905. R. DREHER.

TOOL FOR DENTAL OPERATIONS. APPLICATION IILBD MAR. 29, 1005.

WITNESSES: a) lNl ENT R.

By q/mQ/ L A TTORNE Y munzw. u. camm co, mlum-umcnnnuzns. WAsnmliTom D curn TW P TN ice.

TUOL FOR lDElN'i'l il... UPEHATlONtE.

Specification of Letters Patent.

Patented Aug. 15, 1905.

Application filed March 29, 1905. Serial No. 252,713.

To all whom it 'IIMLZ/ concern:

Be it known thatl, Honou Deanna, a subject of the German Emperor,residing at Idar, Principality of Birkenleld, Grand Duchy of Oldenburg,Germany, have invented a new and useful Tool :for Dental Operations, ofwhich the following is a specification.

l dy invention has for its object the provision of a tool for dentistsadapted for use in the manipulation of lilling material for teeth andwhich is impervious to the action of acids or other chemicals containedin said material.

To this end my invention consists of a dental tool provided with aworking point or blade composed of agate.

By means of the improved device of my invention, wherein the workingpoints or blades are made of agate, which is not attacked by acids, thesame are readily cleaned and may be maintained smooth and polishedthroughout their working life.

My invention will be more fully described in connection with theaccompanying ClI'ZlNV'. ings and will be more particularly pointed outin the appended claim.

lln the drawings, Figure 1 is a view in elevation of a dental toolprovided with a handle having oppositely-extending working points orblades composed of agate. Fig. 2 represents a view of the handledetached from a working point, the latter having a ditterent form fromthose shown in Fig. 1.

Like parts are designated by similar characters of reference throughoutthe figures of the drawings.

My invention, as herein shown, consists of a handle (1, preferablyhollow and open at both. ends. Oppositely-extending working blades orpoints Z) and c are shown, each of said points being provided withtapering shanks which are inserted in the ends of the handle (1. Thesaid points are also provided with flanges adapted to form abuttingsurfaces for the ends of the handle when the points or blades are forcedtightly in place therein. By means 01 the tapering ends the points aremade interchangeable with the handle and the latter may be used inconnection with a large number of points of different shapes. in Fig. 2the handle a is shown in a position to be connected with a working point(Z, which is of a generally curved formation. 1 construct the points 0,Z) and (ii entirely of agate, although if it is desired only so much ofthe points may be formed of that material as is generally brought incontact with the filling material. it is well known that agate isimpervious to theaction of acids and that it can be safely used inconnection with filling material for dental work without danger of beingcorroded or otherwise impaired by the actions of chemicals which saidmaterial contains.

The device of my invention has the practical advantage of greatdurability and also of being very cheaply manufactured, inasmuch asagate is the least valuable of the precious stones.

Vthat I claim, and desire to secure by Letters Patent, is

A tool for dental operations provided with a working point or bladecomposed of agate.

lln testimony whereof I aliix my signature in presence of two witnesses.

RUDOLF DltiElilltR.

With esses:

J. G. Dnnunu, WTALTIER lliinsrne.

